The figures (top) — every chord you hold draws the Lissajous of its frequency ratio. A simple ratio (consonant) makes a clean knot; a complex one (dissonant) tangles. you sit centre, the beat echoes top-left, the loop bottom-right.
The staff — each note blooms a geometric figure (naturals coloured, sharps in ink), and the line riding it is a live oscilloscope of the actual sound.
Beat — two independent rhythm engines. Euclid (16 steps): Density sets how busy, Tempo / Swing the feel. Shadow (12 steps): the rhythm is your chord's geometry. Run both at once for polyrhythm (LCM = 48 steps = 3 bars). Switch Mode to lock the groove, then solo on top.
Loop — tap Rec, then play: it starts on your first key and loops the phrase back underneath you.
Play — A S D F G H J K · sharps W E T Y U · ←/→ change voice · L edit beat · R record · or plug in a MIDI controller.